Sprinkler base



FIG. 1 is a perspective view taken from the top, rear and left side of asprinkler base embodying our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a perspective view taken from the top, rear and left side of amodified form of the sprinkler base shown in FIG. 1;

FIG. 7 is a top plan view of FIG. 6;

FIG. 8 is a front elevational view of FIG. 6;

FIG. 9 is a right side elevational view of FIG. 6; and

FIG. 10 is a bottom plan view of FIG. 6.

The ornamental design for a sprinkler base, substantially as shown.